Spectra-classes: Spectra* classes

In pierreroudier/specstore: Stores and eases the manipulation of spectra and associated data

Description

The specstore package provides the user with two S4 classes that have been developped to store and manipulate spectroscopy data.

The Spectra class is storing the spectra matrix, along with the wavelengths at which those have been measured, the units in whioch those wavelengths are expressed, and a unique id for each sample in the collection.

The SpectraDataFrame classe is extending the Spectra class by giving the opportunity to store attribute data along with the spectra - this is mostly the case when we want to predict physical or chemical properties from the spectra set.

Common generic methods implemented for these classes include:

summary, show, nrow, length, plot, ..., [, [[, $.

Objects from the Class

Objects can be created by calls of the form new("Spectra", ...), with the constructor functions like Spectra(...), or with the helper functions such as wl and spectra.

Slots

Slots for Spectra* objects

wl:

object of class "numeric"; the wavelengths at which the spectra has been measured

nir:

object of class "matrix"; the spectra, with as many columns as wavelengths, and as many rows as samples

id:

object of class "data.frame" with one attribute; the identification strings for each sample in the collection

units:

object of class "character"; units in which the wavelengths are expressed

data:

object of class "data.frame" containing the attribute data

Author(s)

Pierre Roudier [e-mail]

Examples

showClass("Spectra")
showClass("SpectraDataFrame")

pierreroudier/specstore documentation built on May 25, 2019, 6:09 a.m.